Renesas 7008L20PF

Overview

IDT7008L20PF from Integrated Device Technology (IDT) is a high-speed 64K × 8 true dual-port static RAM with independent left/right ports, 20 ns max access time (industrial grade), TTL-compatible 5V ±10% supply, and integrated semaphore/arbitration logic for inter-processor communication in real-time embedded systems.

For engineers reviewing the IDT7008L20PF datasheet, IDT7008L20PF pinout, IDT7008L20PF application, or IDT7008L20PF equivalent, key selection considerations include BUSY/INT flag timing, M/S master/slave configuration, dual CE control per port, semaphore address mapping (A0–A2), and industrial temperature support (–40°C to +85°C).

Technical Context

The IDT7008L20PF implements fully asynchronous dual-port architecture with separate address, data, and control buses for left (L) and right (R) ports - enabling simultaneous read/write to same or different addresses without contention. Its on-chip arbitration logic resolves port conflicts via BUSY flag assertion and supports hardware semaphore signaling using dedicated SEM pins and I/O0–I/O7.

It features two independent chip-enable pairs (CE0L/CE1L and CE0R/CE1R), push-pull BUSY/INT outputs (non-tri-state), and M/S pin-controlled master/slave operation: M/S = VIH enables BUSY output (master mode); M/S = VIL configures BUSY as input (slave mode). All timing parameters - including tBDD (BUSY disable to valid data) and tSPS (semaphore contention window) - are specified at 20 ns speed grade for industrial temperature range.

Key Specifications

Pinout & Package

Package: 100-pin Thin Quad Flatpack (TQFP), body size ≈ 14 mm × 14 mm × 1.4 mm, lead-free green option available. Pin 1 index corner marked per JEDEC standard.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-port SRAM applications.

Compared with CY7C028V-20AC and AS7C362000B-20TIN, the IDT7008L20PF uniquely delivers 5 V TTL compatibility, integrated semaphore/BUSY hardware, and dual CE per port - making it optimal for industrial 5 V multi-processor systems requiring zero-software arbitration overhead.

Availability

IDT7008L20PF is available at Aetrix Electronics and suitable for real-time multi-processor communication, digital signal processing buffering, and industrial motion controller memory requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for IDT7008L20PF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Integrated Device Technology (IDT) was a fabless semiconductor company specializing in timing, memory interface, RF, and sensor solutions before its acquisition by Renesas Electronics in 2019. IDT pioneered high-performance dual-port SRAM architectures for embedded real-time systems.

The IDT7008 product line was designed specifically for deterministic inter-processor communication in industrial automation, avionics, and telecom infrastructure - emphasizing hardware arbitration, low-latency access, and robust operation across wide temperature ranges.

FAQ

What is the maximum operating temperature range supported by the IDT7008L20PF?

The IDT7008L20PF is qualified for industrial temperature operation from –40°C to +85°C. This rating applies across all specified DC and AC electrical characteristics, including the 20 ns maximum access time, BUSY arbitration timing, and semaphore functionality - ensuring reliable performance in harsh environments like factory floors or vehicle engine compartments.

How does the M/S pin affect BUSY pin behavior on the IDT7008L20PF?

When M/S = VIH, the IDT7008L20PF operates as a master: BUSYL and BUSYR become push-pull outputs that assert LOW during port contention. When M/S = VIL, it operates as a slave: BUSYL and BUSYR become inputs that must be driven LOW by a master device to inhibit writes - enabling hierarchical arbitration in multi-device systems without external logic.

Can the IDT7008L20PF perform simultaneous reads from both ports to the same memory location?

Yes, the IDT7008L20PF uses true dual-port SRAM cells that allow concurrent reads from both left and right ports to identical addresses with no timing penalty or data corruption. This capability is inherent to the cell design and requires no special configuration - it works at full 20 ns speed grade under industrial temperature conditions.

What are the valid address ranges for interrupt flag generation on the IDT7008L20PF?

The IDT7008L20PF generates interrupt flags at two fixed addresses: writing to FFFE_H (hex) on the right port asserts INTL on the left port, and writing to FFFF_H on the left port asserts INTR on the right port. These locations function as mailboxes - the 8-bit data written is user-defined and accessible as normal SRAM if interrupts are unused.

Does the IDT7008L20PF support depth expansion without external logic, and how is it implemented?

Yes, the IDT7008L20PF supports depth expansion using its dual chip-enable pair per port (CE0L/CE1L and CE0R/CE1R). By connecting address MSBs to external decode logic and tying CE0/CE1 appropriately, multiple IDT7008L20PF devices can be stacked to form larger memories (e.g., 128K×8) - eliminating the need for additional gates or CPLDs in the address path.